Difference of keywords ‘typename’ and ‘class’ in templates?

typename and class are interchangeable in the basic case of specifying a template: and are equivalent. Having said that, there are specific cases where there is a difference between typename and class. The first one is in the case of dependent types. typename is used to declare when you are referencing a nested type that depends on another template parameter, such as the typedef in … Read more

What does “missing template argument” mean?

I’m pretty new to C++ and this site so there are bound to be errors. When I try to compile my code I get errors like error: missing template argument before ‘b’. I’ve been searching the world for answers for hours and it has led me here. My assignment is to implement a templated class Collection … Read more

What does “missing template argument” mean?

I’m pretty new to C++ and this site so there are bound to be errors. When I try to compile my code I get errors like error: missing template argument before ‘b’. I’ve been searching the world for answers for hours and it has led me here. My assignment is to implement a templated class Collection … Read more

Argument list for class template is missing

First of all, this is how you should provide a definition for member functions of a class template: Secondly, those definitions cannot be put in a .cpp file, because the compiler won’t be able to instantiated them implicitly from their point of invocation. See, for instance, 

Officially, what is typename for?

Following is the quote from Josuttis book: The keyword typename was introduced to specify that the identifier that follows is a type. Consider the following example: Here, typename is used to clarify that SubType is a type of class T. Thus, ptr is a pointer to the type T::SubType. Without typename, SubType would be considered a static member. Thus would be a multiplication of value SubType of type T with ptr.

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)